April 22, 2026

Capitalizations Index – B ∞/21M

New Ways to Control Your Crypto 🚀

Blockchain Blog
New Ways to Control Your Crypto 🚀

We built the Blockchain Wallet because we’re driven by a relentless passion for making crypto easy to use. We want everyone to be able to use it, not just invest in it.

We believe that owning and controlling your own private key is the single most important aspect of using crypto. Without a private key, you aren’t using crypto – you’re just speculating and you’re missing the defining part of crypto: user controlled, sovereign money.

It was enabling that exact need that underpinned the development of the Blockchain Wallet six years ago. The mission? Make it easy for every user to have their own private key, to get users away from storing funds at exchanges and “bitcoin banks”, and to enable everyone to be their own bank.

Fast forward six years and we’ve achieved a few things that we’re proud of:

Building the first cross-platform, non-custodial, and cross-chain wallet
Signing up 30 million wallets in 140 countries globally
Powering over $200 billion in consumer transaction volume and over 80 million consumer crypto transactions in the last two years alone
Championing the cause of financial sovereignty and user-control with regulators around the world. (We’ve spent thousands of hours and millions on education and outreach.)
Helping our users store millions of BTC, BCH & ETH coins and generate over a quarter of bitcoin network traffic alone

Most importantly, it’s been a honor and privilege to be the first place tens of millions of people turn in order to actually use crypto and hold their own keys.

But there’s a lot still to do.

At the end of the last bull run, we did a serious self-assessment and asked ourselves, what do users need that we aren’t delivering today? We identified four common requests and frustrations:

Better, faster ways for new users to get their first crypto and make their first transaction
More storage types, like hardware, as users’ balances increased
More assets as users want to store and use an increasingly diverse asset set
Better, more reliable sources of liquidity as trading and investing across assets continues to increase

Satisfying these demands meant building a huge extension of our platform, at scale. We’ve had our heads down much of this year doing exactly that and starting today we’re excited to begin delivering new solutions to you, beginning with two new capabilities.

First, we’re launching Swap by Blockchain: a next generation trading product with best-in-class liquidity and execution, powered by our new machine trading software platform that ensures best execution across assets. Blockchain Wallet users will now have access to exchange-like prices without giving up control of their keys or their crypto. And trade limits will increase from hundreds to thousands of dollars of crypto per trade.

While the system currently has deep liquidity drawn from a variety of sources, we plan to add more liquidity sources over time, including decentralized exchange protocols. We’ve rebuilt our risk and KYC systems, so that you can onboard with ease, in minutes. Swap ensures our users stay liquid and can trade at the best prices in the market, regardless of overall market volatility and challenges. We’ve started rolling Swap out today and everyone will have access over the next two weeks.

Secondly, we’re launching Lockbox: a hardware vault in your pocket, built in partnership with hardware leader Ledger. Lockbox is simple to use and is even more secure thanks to a locked endpoint that prevents phishing and spoofing attacks. It’s hardware made easy, with a setup that takes just a few moments thanks to our custom hardware-software integration.

With Lockbox you’re able to check your balance and receive transactions, on mobile and web, without the inconvenience of having to plug your device in every time. In an industry first, you’ll also be able to trade directly from your Lockbox while still maintaining your keys. In conjunction with Lockbox, we’re also excited to let current Ledger device owners seamlessly pair with the Blockchain Wallet and trade directly from the Ledger device they already own.

And we have more coming this year, including additional assets and new products within the Blockchain Wallet that will bring you new, faster, and better ways to get started in crypto.

We’re here to build a new financial system and the Blockchain Wallet is your passport to that new world. Store crypto, trade crypto, transact with crypto and most importantly truly own and control your crypto.

We’re dedicated to building the functionality you want, without compromising your control of your key. Your crypto is yours, and it should stay that way.

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Bitcoin Core 0.15.0 Is Released: Here’s What’s New

Bitcoin Core 0.15.0 Released: Here’s What’s New

Today marks the official release of Bitcoin Core 0.15.0, the fifteenth generation of bitcoin’s original software client launched by Satoshi Nakamoto almost nine years ago. Overseen by Bitcoin Core lead maintainer Wladimir van der Laan, this latest major release was developed by nearly 100 contributors over a six-month period, with major contributions through Chaincode Labs, Blockstream and MIT’s Digital Currency Initiative.

bitcoin Core 0.15.0 offers significant performance and usability improvements over previous versions of the software implementation. It also introduces several new features to better deal with the current status of the network.

These are some of the more notable changes.

Chainstate Database Restructure

One of the biggest changes compared to previous versions of the software involves how the state of bitcoin’s blockchain is stored. This “chainstate” or “UTXO-set” is saved in a dedicated database, whereas previously it had been categorized per transaction. If one transaction sent bitcoins to several outputs (“addresses”), these different outputs were stored as a single database entry, referring to that one transaction.

With bitcoin Core 0.15.0, these outputs are instead stored in a single database entry each. If a single transaction sends bitcoins to different outputs, every output is stored separately. While this method does claim more disc space, it requires less computational resources if one of these outputs is spent later on.

The most concrete benefit of this new data structure is that initial sync-time for new nodes is decreased by about 40 percent. It also introduces simpler code, reduces memory usage  and more. Additionally, it fixes a bug that could theoretically crash bitcoin Core nodes, controversially revealed at last weekend’s Breaking bitcoin conference in Paris.

Improved Fee Estimation

As bitcoin blocks have been filling up over the last year or two, not all transactions fit in the first block that is mined. Instead, miners typically prioritize the transactions that include the most fees. If a user wants to have his transaction confirmed quickly, he should include a high enough fee. If he’s not in a rush, a lower fee should suffice.

However, the bitcoin network deals with inherent unpredictability in terms of the speed at which blocks are found or the number of transactions that is being transmitted at any time. This makes it hard to include the right transaction fee.

bitcoin Core 0.15.0 lowers this fee uncertainty: The newest version of the software includes significantly better fee estimation algorithms. This is mostly because the software takes more data into account when making the estimations, such as the fees included in older confirmed transactions, as well as fees in unconfirmed transactions — the fees that proved insufficient.

Additionally, users can enjoy more flexibility. For one, bitcoin Core 0.15.0 for the first time allows users to include fees that could take their transactions up to a week to confirm. And, also newly introduced, users can choose to accept more or less risk that their transaction could be delayed due to a sudden influx of transactions.

Replace-by-fee in User Interface

Even with improved fee estimation, it is possible that users will still need to wait longer than they want for their transactions to confirm, perhaps because there is a sudden rush of transactions on the network, or maybe because a user changed his mind and prefers to have a transaction confirm faster than originally paid for, or for other reasons.

For these cases, some wallets let users add a “replace-by-fee” tag to their transactions. With such a tag, nodes and miners on the network know that the sender may want to replace that transaction with a newer transaction that includes a higher fee. This effectively allows users to bump the transaction in line to have it confirmed faster.

bitcoin Core nodes have supported replace-by-fee for well over a year now: They already replace “replace-by-fee” tagged transactions if the new transaction includes more fees. But it was never easy to utilize for bitcoin Core wallet users themselves.

Until now.

The bitcoin Core 0.15.0 wallet introduces a replace-by-fee toggle in its user interface. This lets users include the appropriate tag, allowing them to easily increase the fees on their transactions later on.

Multi-wallet Support (Client and RPC Only)

bitcoin Core 0.15.0 lets users create several wallets for the first time. These wallets all have their own separate bitcoin addresses, private keys and, therefore, funds. Users can utilize the different wallets for different purposes; for example, one wallet can be used for personal day-to-day purchases, another for business-related transactions, and a third just for trading.

Using several wallets can offer a number of benefits. For instance, it makes accounting easier and more convenient. Additionally, users can more easily benefit from increased privacy as the different wallets cannot be linked to each other by blockchain analysis. It’s also possible to use different wallets for specific applications and more.

For now, multi-wallet support is not yet available for regular wallet users; only advanced users who operate from the command line or through connected applications can utilize the feature.

Other Improvements

Apart from the above mentioned notable changes, bitcoin Core 0.15.0 includes a number of additional performance improvements, as most new major bitcoin Core releases do. Concretely, these changes speed up how quickly blocks are downloaded from the network, they let nodes start up faster, and up-to-date nodes will be able to validate new blocks more quickly, in turn benefiting network-propagation time.

Finally, it’s worth mentioning that bitcoin Core 0.15.0 will disconnect from BTC1 peers on the network. This means that the bitcoin network will experience less disruption if the SegWit2x hard fork splits the network, as both types of nodes will more easily find compatible peers. While this change has gotten some media attention, this change shouldn’t really be noticeable.

Thanks to Chaincode Labs developer John Newbery for feedback and suggestions. For more details on what’s new in bitcoin Core 0.15.0, see the release notes, or watch bitcoin Core contributor Gregory Maxwell’s “deep dive” presentation at the San Francisco bitcoin developers meetup.

The post Bitcoin Core 0.15.0 Is Released: Here’s What’s New appeared first on Bitcoin Magazine.